All these ebooks are in EPUB 3 format. You will need a EPUB reader to read this ebook.

Before Payment: Make sure you see the price.

During Payment: If payment has failed, but money had been debited, it will be automatically refunded between 5-7 days.

After Payment: You will receive your file(s) through mail within 24 hours. I have to send it manually. 

After Receiving Files: Please download your zip file, Unzip it to extract EPUB file and Read it using EPUB Reader.

For Queries: computersciencebrainery@gmail.com

1. On your device, open Google Play Books .

2. At the top right, tap your profile picture.

3. Tap Play Books settings.

4. Check the box next to Enable PDF uploading.

From the email attachment,

5. Tap the attachment > Upload to Play Books. 

(or)

Tap the attachment > Open with Play Books